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https://www.readbyqxmd.com/read/28616958/interconnected-molybdenum-carbide-based-nanoribbons-for-highly-efficient-and-ultrastable-hydrogen-evolution
#1
Zhihua Cheng, Jian Gao, Qiang Fu, Changxia Li, Xiaopeng Wang, Yukun Xiao, Yang Zhao, Zhipan Zhang, Liangti Qu
Electrocatalytic hydrogen evolution reaction (HER) is of great significance to produce clean, sustainable and cost-effective hydrogen. However, the development of low-cost and high efficient non-noble-metal catalysts with a combination of superior catalytic activity and long-time stability still remains a challenge. Herein, we demonstrate a rationally designed three dimensional (3D) architecture assembled from 1D molybdenum carbide (MoC) based nanoribbons where the MoC nanoparticles are embedded within nitrogen-doped crystallized carbon nanolayers (MoC@NC nanoribbon)...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28609535/comparison-of-content-on-the-american-board-of-internal-medicine-maintenance-of-certification-examination-with-conditions-seen-in-practice-by-general-internists
#2
Bradley Gray, Jonathan Vandergrift, Rebecca S Lipner, Marianne M Green
Importance: Success on the internal medicine (IM) examination is a central requirement of the American Board of Internal Medicine's (ABIM's) Maintenance of Certification program (MOC). Therefore, it is important to understand the degree to which this examination reflects conditions seen in practice, one dimension of content validity, which focuses on the match between content in the discipline and the topics on the examination questions. Objective: To assess whether the frequency of questions on IM-MOC examinations were concordant with the frequency of conditions seen in practice...
June 13, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28604594/hemi-synthesis-and-anti-oomycete-activity-of-analogues-of-isocordoin
#3
Beatriz Escobar, Iván Montenegro, Joan Villena, Enrique Werner, Patricio Godoy, Yusser Olguín, Alejandro Madrid
An efficient synthesis of a series of 4'-oxyalkyl-isocordoin analogues (2-8) is reported for the first time. Their structures were confirmed by ¹H-NMR, (13)C-NMR, and HRMS. Their anti-oomycete activity was evaluated by mycelium and spores inhibition assay against two selected pathogenic oomycetes strains: Saprolegnia parasitica and Saprolegnia australis. The entire series of isocordoin derivatives (except compound 7) showed high inhibitory activity against these oomycete strains. Among them, compound 2 exhibited strong activity, with minimum inhibitory concentration (MIC) and minimum oomyceticidal concentration (MOC) values of 50 µg/mL and 75 µg/mL, respectively...
June 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28600147/chemoresistance-and-chemosensitization-in-cholangiocarcinoma
#4
REVIEW
Jose J G Marin, Elisa Lozano, Elisa Herraez, Maitane Asensio, Silvia Di Giacomo, Marta R Romero, Oscar Briz, Maria A Serrano, Thomas Efferth, Rocio I R Macias
One of the main difficulties in the management of patients with advanced cholangiocarcinoma (CCA) is their poor response to available chemotherapy. This is the result of powerful mechanisms of chemoresistance (MOC) of quite diverse nature that usually act synergistically. The problem is often worsened by altered MOC gene expression in response to pharmacological treatment. Since CCA includes a heterogeneous group of cancers their genetic signature coding for MOC genes is also diverse; however, several shared traits have been defined...
June 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28592687/efferent-inhibition-strength-is-a-physiological-correlate-of-hyperacusis-in-children-with-autism-spectrum-disorder
#5
Uzma S Wilson, Kate M Sadler, Kenneth E Hancock, John J Guinan, Jeffery T Lichtenhan
Autism spectrum disorder (ASD) is a developmental disability that is poorly understood. ASD can influence communication, social interaction, and behavior. Children with ASD often have sensory hypersensitivities, including auditory hypersensitivity (hyperacusis). In adults with hyperacusis who are otherwise neurotypical, the medial olivocochlear (MOC) efferent reflex is stronger than usual. In children with ASD the MOC reflex has been measured, but without also assessing hyperacusis. We assessed the MOC reflex in children with ASD by measuring the strength of MOC-induced inhibition of transient-evoked otoacoustic emissions (TEOAEs), a non-invasive, physiological measure that reflects cochlear amplification...
June 7, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28572294/from-the-abnm-making-moc-simpler
#6
George Segall
No abstract text is available yet for this article.
June 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28562013/dodecahedral-w-wc-composite-as-efficient-catalyst-for-hydrogen-evolution-and-nitrobenzene-reduction-reactions
#7
Zhao-Yang Chen, Long-Fa Duan, Tian Sheng, Xiao Lin, Ya-Feng Chen, You-Qun Chu, Shi-Gang Sun, Wen-Feng Lin
Core-shell composites with strong phase-phase contact could provide an incentive for catalytic activity. A simple, yet efficient, H2O-mediated method has been developed to synthesize a mesoscopic core-shell W@WC architecture with a dodecahedral microstructure, via a one-pot reaction. The H2O plays an important role in the resistance of carbon diffusion, resulting in the formation of the W core and W-terminated WC shell. Density functional theory (DFT) calculations reveal that adding W as core reduced the oxygen adsorption energy and provided the W-terminated WC surface...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28538522/frequency-specificity-and-left-ear-advantage-of-medial-olivocochlear-efferent-modulation-a-study-based-on-stimulus-frequency-otoacoustic-emission
#8
Dongjia Xing, Qin Gong
The medial olivocochlear (MOC) bundle is an auditory nucleus that projects efferent nerve fibers to the outer hair cells (OHCs) for synaptic innervation. The aim of the present study was to investigate the possible existence of frequency and ear specificity in MOC efferent modulation, as well as how MOC activation influences cochlear tuning. Stimulus frequency otoacoustic emissions (SFOAEs) were used to study MOC efferent modulation. Therefore, the current experiment was designed to compare the degree of SFOAE suppression in the both ears of 20 individuals at 1, 2, 4, and 8 kHz...
May 19, 2017: Neuroreport
https://www.readbyqxmd.com/read/28516994/3d-ordered-porous-moxc-x-1-or-2-for-advanced-hydrogen-evolution-and-li-storage
#9
Hong Yu, Haosen Fan, Jiong Wang, Yun Zheng, Zhengfei Dai, Yizhong Lu, Junhua Kong, Xin Wang, Young Jin Kim, Qingyu Yan, Jong-Min Lee
3D ordered porous structures of MoxC are prepared with different Mo to C ratios and tested for two possible promising applications: hydrogen evolution reaction (HER) through water splitting and lithium ion batteries (LIBs). Mo2C and MoC with 3D periodic ordered structures are prepared with a similar process but different precursors. The 3D ordered porous MoC exhibits excellent cycling stability and rate performance as an anode material for LIBs. A discharge capacity of 450.9 mA h g(-1) is maintained up to 3000 cycles at 10...
June 1, 2017: Nanoscale
https://www.readbyqxmd.com/read/28495749/holliday-junction-resolvases-mediate-chloroplast-nucleoid-segregation
#10
Yusuke Kobayashi, Osami Misumi, Masaki Odahara, Kota Ishibashi, Masafumi Hirono, Kumi Hidaka, Masayuki Endo, Hiroshi Sugiyama, Hiroshi Iwasaki, Tsuneyoshi Kuroiwa, Toshiharu Shikanai, Yoshiki Nishimura
Holliday junctions, four-stranded DNA structures formed during homologous recombination, are disentangled by resolvases that have been found in prokaryotes and eukaryotes but not in plant organelles. Here, we identify monokaryotic chloroplast 1 (MOC1) as a Holliday junction resolvase in chloroplasts by analyzing a green alga Chlamydomonas reinhardtii mutant defective in chloroplast nucleoid (DNA-protein complex) segregation. MOC1 is structurally similar to a bacterial Holliday junction resolvase, resistance to ultraviolet (Ruv) C, and genetically conserved among green plants...
May 12, 2017: Science
https://www.readbyqxmd.com/read/28486820/maintenance-of-certification-what-s-to-know
#11
Pat Rich
The Maintenance of Certification (MOC) Program administered by the Royal College of Physicians and Surgeons applies to all Fellows of the Royal College including dermatologists. It is mandatory for those who wish to maintain their fellowship in the Royal College and can be critical for maintaining licensure requirements. Residents can take advantage of the program before becoming Fellows of the Royal College. Fellows and MOC Program participants in the Royal College MOC Program must complete a minimum of 400 credits during a 5-year cycle and a minimum of 40 credits in each year of the cycle...
May 1, 2017: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28481475/phase-and-facet-control-of-molybdenum-carbide-nanosheet-observed-by-in-situ-tem
#12
Ziyuan Lin, Lejuan Cai, Wei Lu, Yang Chai
Transition metal carbides are of great potential for electrochemical applications. The phase and facet of molybdenum carbides greatly affect the electrochemical performance. Carburization of MoO3 inside a transmission electron microscope to monitor the growth process of molybdenum carbides is performed. Carbon sources with different activities are used and the controllable growth of molybdenum carbides is investigated. The results show that the relatively inert amorphous carbon film produces Mo2 C, where the interstitial sites formed by hexagonal closed packing molybdenum atoms are partially occupied by carbon atoms...
May 8, 2017: Small
https://www.readbyqxmd.com/read/28420960/contralateral-inhibition-of-click-and-chirp-evoked-human-compound-action-potentials
#13
Spencer B Smith, Jeffery T Lichtenhan, Barbara K Cone
Cochlear outer hair cells (OHC) receive direct efferent feedback from the caudal auditory brainstem via the medial olivocochlear (MOC) bundle. This circuit provides the neural substrate for the MOC reflex, which inhibits cochlear amplifier gain and is believed to play a role in listening in noise and protection from acoustic overexposure. The human MOC reflex has been studied extensively using otoacoustic emissions (OAE) paradigms; however, these measurements are insensitive to subsequent "downstream" efferent effects on the neural ensembles that mediate hearing...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28420510/gene-set-based-analysis-of-mucinous-ovarian-carcinoma
#14
Chia-Ming Chang, Peng-Hui Wang, Huann-Cheng Horng
OBJECTIVE: Mucinous ovarian carcinoma (MOC) is an uncommon subtype of epithelial ovarian cancers, and the pathogenesis is still poorly understood because of its rarity. We conducted a gene set-based analysis to investigate the pathogenesis of MOC by integrating microarray gene expression datasets based on the regularity of functions defined by gene ontology or canonical pathway databases. MATERIALS AND METHODS: Forty-five pairs of MOC and normal ovarian tissue sample gene expression profiles were downloaded from the National Center for Biotechnology Information Gene Expression Omnibus database...
April 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28419451/do-state-continuing-medical-education-requirements-for-physicians-improve-clinical-knowledge
#15
Jonathan L Vandergrift, Bradley M Gray, Weifeng Weng
OBJECTIVE: To evaluate the effect of state continuing medical education (CME) requirements on physician clinical knowledge. DATA SOURCES: Secondary data for 19,563 general internists who took the Internal Medicine Maintenance of Certification (MOC) examination between 2006 and 2013. STUDY DESIGN: We took advantage of a natural experiment resulting from variations in CME requirements across states over time and applied a difference-in-differences methodology to measure associations between changes in CME requirements and physician clinical knowledge...
April 16, 2017: Health Services Research
https://www.readbyqxmd.com/read/28406257/nitrogen-doped-carbon-encapsulating-%C3%AE-moc-ni-heterostructures-for-efficient-oxygen-evolution-electrocatalysts
#16
Xueping Zhang, Liang Huang, Yujie Han, Miao Xu, Shaojun Dong
Developing efficient and earth-abundant oxygen evolution reaction (OER) electrocatalysts is of great importance in renewable energy research. Herein, we report nitrogen-doped carbon encapsulating γ-MoC/Ni heterostructures (γ-MoC/Ni@NC) for the first time as efficient OER electrocatalysts. The composites can be controlled by the addition of a Mo source to form a nanoparticle-assembled hierarchically porous nanostructure, which can enlarge the specific surface area, thus exposing more active sites. Moreover, we demonstrate that the formation of γ-MoC@Ni heterostructures and the resulting synergistic effect between γ-MoC and Ni can facilitate the reaction kinetics, leading to significantly improved OER activity with an onset overpotential of merely 240 mV, and a low overpotential of 310 mV to afford a current density of 10 mA cm(-2)...
May 4, 2017: Nanoscale
https://www.readbyqxmd.com/read/28399027/relatively-poor-survival-of-mucinous-ovarian-carcinoma-in-advanced-stage-a-systematic-review-and-meta-analysis
#17
Michiel Simons, Leon Massuger, Jolien Bruls, Johan Bulten, Steven Teerenstra, Iris Nagtegaal
OBJECTIVE: Overall, patients with mucinous ovarian carcinoma (MOC) are considered to have a better prognosis compared with the whole group of nonmucinous carcinomas. However, some studies indicate that patients with advanced-stage MOC might have a worse prognosis than those with advanced-stage serous ovarian carcinoma (SOC). We carried out a systematic review and meta-analysis of the current literature. MATERIALS AND METHODS: A comprehensive literature search was carried out identifying 19 articles that compare survival of patients with MOC and patients with SOC...
May 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28396709/human-ipsc-derived-myocardium-on-chip-with-capillary-like-flow-for-personalized-medicine
#18
Bradley W Ellis, Aylin Acun, U Isik Can, Pinar Zorlutuna
The heart wall tissue, or the myocardium, is one of the main targets in cardiovascular disease prevention and treatment. Animal models have not been sufficient in mimicking the human myocardium as evident by the very low clinical translation rates of cardiovascular drugs. Additionally, current in vitro models of the human myocardium possess several shortcomings such as lack of physiologically relevant co-culture of myocardial cells, lack of a 3D biomimetic environment, and the use of non-human cells. In this study, we address these shortcomings through the design and manufacture of a myocardium-on-chip (MOC) using 3D cell-laden hydrogel constructs and human induced pluripotent stem cell (hiPSC) derived myocardial cells...
March 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28390599/medial-olivocochlear-function-in-children-with-poor-speech-in-noise-performance-and-language-disorder
#19
Caroline Nunes Rocha-Muniz, Renata Mota Mamede Carvallo, Eliane Schochat
OBJECTIVES: Contralateral masking of transient-evoked otoacoustic emissions is a phenomenon that suggests an inhibitory effect of the olivocochlear efferent auditory pathway. Many studies have been inconclusive in demonstrating a clear connection between this system and a behavioral speech-in-noise listening skill. The purpose of this study was to investigate the activation of a medial olivocochlear (MOC) efferent in children with poor speech-in-noise (PSIN) performance and children with language impairment and PSIN (SLI + PSIN)...
May 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28390134/primordial-odontogenic-tumor-an-immunohistochemical-profile
#20
R Bologna-Molina, T Mikami, V Pereira-Prado, F-R Pires, R Carlos-Bregni, A Mosqueda-Taylor
BACKGROUND: Primordial Odontogenic Tumor (POT) is a recently described odontogenic tumor characterized by a variably cellular loose fibrous tissue with areas similar to the dental papilla, covered by cuboidal to columnar epithelium that resembles the internal epithelium of the enamel organ, surrounded at least partly by a delicate fibrous capsule. The purpose of this study was to investigate the possible histogenesis and biological behavior of this rare tumor by means of a wide immunohistochemical analysis of its epithelial and mesenchymal components...
May 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
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